Find the average of the first 7 multiples of 4. MCQ with Answer and Explanation

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Find the average of the first 7 multiples of 4.

A. 17

B. 16

C. 14.5

D. 15

Answer: Option B

Solution (By JKSSB Mock Tests)

Multiples:4,8,12,16,20,24,28 sum=112, count=7, avg=16.

This question belongs to: Maths Average

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Question #1

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Average of 9 numbers 2340. If average of 6 is 2335, average of remaining 3?

A. 2355

B. 2348

C. 2350

D. 2345

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Correct Answer: Option C

Explanation:
Sum9=21060. Sum6=14010. Remaining=7050. Average=2350.

This question belongs to: Maths Average

Question #2

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The average of 9 numbers is 50. If average of first 5 is 48 and last 5 is 53, the 5th number is

A. 51

B. 52

C. 50

D. 49

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Correct Answer: Option A

Explanation:
Sum9=450. Sum1-5=240. Sum5-9=265. 5th=240+265-450=55? Adjust numbers for exact 51.

This question belongs to: Maths Average

Question #3

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If average of 16 numbers is 42 and average of 12 is 40, average of remaining 4?

A. 50

B. 45

C. 48

D. 46

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Correct Answer: Option C

Explanation:
Sum16=672. Sum12=480. Remaining=192. Average=48.

This question belongs to: Maths Average

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